Signal for motor vehicles



E. AUFIERO.

SIGNAL FOR MOTORVEHICLES.

APPLICATION man FEB.26| 1921.

Patented May 2,

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UNITEDSTATES PATENT oFFlce;

EMANUEL AuEIEno, or isnooKLYN, NEW YoEx, ASSIGNOR to E. A. LABORATORIES, me, or BROOKLYN, NEW Yonx, A conroaa'rron or NEW YORK.

SIGNAL ron MoroE vEHronEs.

To all whom it may concern:

Be it known that I, EMANUEIJ Anrrnno, a

citizen of the United States, residing at Brooklyn, in the county of Kings, State of New York, haveinvented certain new and useful Improvements in Signals for Motor Vehicles; and I do hereby declare the following to be. a full, clear, and exact description ,of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in warning signals, particularly of the character known as motor-driven diaphragm horns. In such horns the diaphragm is vibrated by means of a small electric motor contained in a 'casing supported in proximity to the diaphragm of the horn.

The invention of this application relates particularly to the construction of the motor and its mounting and the object of the 'in-' vention is to provide a motor and mounting of simple, inexpensive construction, easily connected to and detached from the dia phragm casing, and in such manner that it may not be easily displaced by the shocks and jars to which it will be subjected.

A further object of the invention is to provide for securing thorough lubrication of the motor without the necessity for frequent attention.

My improved motor and mounting also contain other novel features of construction, the details and advantages of which will be pointed out in the following specification.

In the accompanying drawings 1 have illustrated in detail a horn embodying my improvements, and in the drawings,

Figure 1 is a side view with the cover in section, I

Figure 2 is a horizontal section, Figure 3 is a section on the line of Fi ure 1, v

igure 4 is a side view of the motor shaft,

and its adjusting means, with a part in section,

Figure 5 is a front and a slde view of one 111' signals of this character, it is desirable that the mechanism be of such nature thatv it may be easily and cheaply constructed and preferably without the necessity for eastings, and that the parts be so arranged that damage will not readily result from shock Specification of Letters Patent.

Application filed. February 26, 1921. Serial No. 448,0518.

laterally Patented ma 2, was.

and jar to which the signal will be subjected in use.

It is also desirable that some means be provided for insuring a thorough lubrication of the motor, without the necessity for frequent attention, and that the motor shaft, which controls the sounding of the alarm, be so arranged that it may be adjusted to compensate for wear between the engaging parts of the shaft and diaphragm, and that it be off center as regards the axis of the dia phragm, in order that the engaged portion of the diaphragm may be at the center of the same, to secure the largest amplitude of Vibration;

In the present embodiment of the invention the improved signal comprises a diaphragm chamber" or casing, consisting of sections 1 and 2 which are detaohably connected, by means of screws 3. The section 1 is a ring, and the amplifier 4 is connected with the opening of the ring. The diaphragm 5 is clamped between the sections by the screws 3, and the diaphragm carries a tooth or lug 6 whi h is adapted to be engaged by the teeth of a disc 7 which is sebe described. A shaft 8 extends through an opening in the section 2, and it is ofi'setlaterally with respect to the tooth 6, which is at the center of the diaphragm.

The motor which controls the shaft has cured to an electrically controlled motor to pole pieces 9, each of which is of a laminated structure, being composed of a series of superposed laminae or plates, which may be cut or stampedfrom suitable sheet 'metal.

Referring to Figure 5, it will be seen that each lamlna has a lug 10 extending lon itudinally therefrom, at the end remote romthe motor shaft.

The pole pieces are supported by a'substantially square bracket or frame, consisting of, a body 11 and arms 12 extending from-the body. The body 11 of the frame has an opening through which the shaft 8 extends, and the pole pieces are supported by the arms. The lugs 10 of the lamina of each pole piece are passed through a' longitudinally extending slot in the adjacent arm, and the lugs are upset or headed on the outer face of the arm, as clearly shown in Figure 2. Field windings 13 are mounted on the pole pieces in the usual manner, and

the armature 15 is carried by the shaft 8.

The brushes 16 are secured to the arins 12 of the bracket in insulated relation as shown, and they cooperate with the commutator 17 in the usual manner. The bracket 11-12 is a. steel strip, and the said frame supports all the mechanism of the motor. Each arm 12 has at the end remote from the body an inwardly extending lug 18, and these lugs lap upon a bar 19, and are Secured thereto by. means of screws 20. The bar is secured to the section 2 of the diaphragm chamber by means of the'screws 20, and the frame 11-12 is thus supported by the bar and by the diaphragm chamber wall.

In order that the sound of the signal may be clear, it is important that the engagement between the teeth of the cam disc 7 and the tooth 6 be bya predetermined distance, and that there be no end play of the armature shaft. When the improved signal is used, the very rapid movement of the shaft 8 will cause the rapid wear of the tooth 6 and the teeth of the cam disc 7. When the teeth become worn, the sound of the signal will lose in clearness, and to compensate for the wear, as well as to permit the shaft to be adjusted to obtain the best possible results, I mount the shaft in such manner that it may be movedtoward and from the diaphragm, and may be firmly held in adjusted position.v With this object in view I provide the body 11 of the bracket with an opening, through which the shaft extends, of a diameter suflicient to receive a cap nut 21, which receivesthe reduced end of the shaft 8. This reduced end has an annular o-ve 22 within the capnut, and the groove is engaged by a lug 23 extending laterally from the key 24 which rests within a longitudinally extending groove in the. cap nut. The cap nut has threaded engagement with the body 11 of the bracket, and it will be obvious that by turning the nut in the proper direction, the shaft 8 may be moved toward and from the diaphragm. The capnut is locked in-adjusted position by means of a lock nut 25, and the cam disc 7 has threaded engagement with the shaft.

In order to insure proper lubrication without the necessity for frequent attention, I arrange an oil cup at each end of the armature shaft; Each of these oil cups as shown in Figures 2 and 3. is composed of a plate 26 which is riveted to the body 11 of the bracket, or-to the bar 19 as the case may be at the opening for the shaft. Each of these plates has a portion thereof offset outwardly away from the bar or bracket body, to provide a cup for a lubricant and the shaft ex tends through this cup, When the cups are filled, the shaft will be lubricated bythe lubricant in the cups, and but little atten tion will be required to insure thorou h lubrication. ,The plates 26 are riveted to t e g body 11 and to the bar. The motor and its emma support are enclosed by a cap shaped cover 27, which fits over a cylindrical portion formed in the section 2 of the diaphragm chamber. a The cover is held in place by means of screws 28, and these screws are passed through openings in the cover and into engagement with threaded openings in lugs 29 extending laterally from the barnal, all cast iron parts and machined parts are eliminated from the construction of the motor and its support, being replaced by sheet steel parts, which can be produced cheaply by die work in apower press. Referring to Figure 1, it will be seen that the binding posts 30 for the terminals of the electric circuit which supplies the motor with current are arranged on the section 2 of the diaplira chamber, and below the hood or cover 2 Here they will be out of the way, and the wires are not liable to come into contact with other metal parts of the si al housing, to cause short circuiting.

claim:

1. In a signal, the combination with the diaphragm chamber, and the diaphragm therein, of an electrically controlled motor for vibrating the same, and a support for the motor, saidsupport comprising a bar for connection with the chamber wall and having an opening for the shaft, a substantially rectangular bracket comprising a body having an opening for the motor shaft and arms connected with the bar, the bar having lateral lugs at its ends, and a cover for the motor fitting outside the lugs, and detachably connected thereto.

2. In a warning signal, the combination of a diaphragm, a sheet metal casing supporting said diaphragm, an electric motor for vibrating said diaphragm also supported by said casing, said motor comprising a substantially rectangular frame of sheet metal, field magnets supported in two parallel sides of said frame, bearings for the armature shaft in the other two parallel sides, one of said last named sides being formed of a (piece separate from the rest of the frame and from said diaphragm casing and detachably connected to the rest of the frame and also detachably connected to the diaphragm casing, the said shaft bearings be ing thereby in different frame pieces so that the motor may be takenrdown by separating said frame pieces.

3. In a warning signal, the combination of a diaphragm, a sheet metal casing supporting said diaphragm, an electric motor for vibrating said diaphragm also support edby said. casing, said motor comprising a substantially. rectangular frame of sheet metal, field magnets supported in two paral- --lel sides of said frame, bearings for the armature shaft in the other two parallel sides, '5 one of said last named sides being formed of T, a piece separate from the rest of the frame and, from the diaphragm casing and detach 

